fix: add config reload flags to the state middleware

lib/middlewares/populateSettings.js

@@ -1,11 +1,12 @@
+const _ = require('lodash/fp')
+
 const state = require('./state')
 const newSettingsLoader = require('../new-settings-loader')
 const helpers = require('../route-helpers')
 const logger = require('../logger')
 
-const { settingsCache } = state
-
 const populateSettings = function (req, res, next) {
+  const { needsSettingsReload, settingsCache } = state
   const operatorId = res.locals.operatorId
   const versionId = req.headers['config-version']
   if (versionId !== state.oldVersionId) {
@@ -14,20 +15,21 @@ const populateSettings = function (req, res, next) {
 
   try {
     const operatorSettings = settingsCache.get(operatorId)
-    if (!versionId && operatorSettings) {
-      req.settings = operatorSettings
-      return next()
-    }
-
-    if (!versionId && !operatorSettings) {
+    if (!versionId && (!operatorSettings || !!needsSettingsReload[operatorId])) {
       return newSettingsLoader.loadLatest()
         .then(settings => {
           settingsCache.set(operatorId, settings)
+          delete needsSettingsReload[operatorId]
           req.settings = settings
         })
         .then(() => next())
         .catch(next)
     }
+  
+    if (!versionId && operatorSettings) {
+      req.settings = operatorSettings
+      return next()
+    }
   } catch (e) {
     logger.error(e)
   }

lib/middlewares/state.js

@@ -4,6 +4,7 @@ const SETTINGS_CACHE_REFRESH = 3600
 module.exports = (function () {
   return {
     oldVersionId: 'unset',
+    needsSettingsReload: {},
     settingsCache: new NodeCache({
       stdTTL: SETTINGS_CACHE_REFRESH,
       checkperiod: SETTINGS_CACHE_REFRESH // Clear cache every hour